Dunno how about others, but my question to you was ignored.
Was that your question? My apologies for missing it.Upd: Also, I wonder if any of those troopers will have stalker-like stealth?
To answer it, The Troopers stealth is 98%. Meaning Unless you are a commando and can see the health bar, you have almost no chance in seeing them coming. Of course if look hard enough you'll see them, but not easily.
Hope that answers the question, again sorry I missed it.